text: BC200 RNA has been found to be a factor in numerous types of cancer. Although this type of RNA is normally expressed in neurons, it has been detected in cancers of the breast, cervix, esophagus, lungs, ovaries, parotid glands, tongue, and the colon. In certain cancers, expression of BC200 RNA is upregulated. This occurs in esophageal squamous cell carcinoma (ESCC) and higher expression is considered to be a predictor of poor prognosis and may serve as a predictive biomarker for the disease. It was also discovered to be overexpressed in tumor cells of colorectal cancer where the transcript is located just next to a known oncogene, epithelial cell adhesion molecule (EpCAM). Here, expression of BC200 RNA and EpCAM are believed to be correlated as they both play a role in cell migration and invasion. Conversely, research has indicated that BC200 RNA is downregulated in ovarian cancer, as it is a tumor suppressor in normal ovarian cells controlling proliferative ability.